Supercapacitor based energy recovery system for an elevator

A Novel Reconstruction Approach to Elevator Energy Conservation Based on a DC Micro-Grid in High-Rise Buildings

“…At present, researchers have used energy storage devices to store elevator regenerative energy [38][39][40][41][42][43][44]. The papers [38,39] have presented the operational simulation of an elevator with supercapacitor in MATLAB. The paper [40] proposes a supercapacitor-based energy recovery system with improved power control and energy management capability.…”

“…Existing research [38][39][40][41][42][43][44] presents that the energy-efficiency rate is 23-58.6% under the condition that a set of storage devices is installed for each elevator. The energy-efficient rate of the proposed method is similar to that of existing research, which indicates that it is unnecessary to increase proportionally the capacity of storage devices with the increase in the number of elevators.…”

Supercapacitor-Based Energy Storage in Elevators to Improve Energy Efficiency of Buildings

“…Supercapacitors have a high power density, a fast charge/discharge rate, a high number of charge/discharge cycles, and a long lifetime, making them suitable for elevator applications characterized by a high number of starts and stops, short trips, and high braking power in regenerative mode [12]. Typical designs of energy storage systems in elevator applications use a bidirectional DC/DC converter and a supercapacitor bank [8,[13][14][15][16][17][18][19][20][21][22][23]. The research studies presented in the literature focus on control strategies [15,17], storage system design [13,14,[18][19][20][21][22], supercapacitor bank sizing [8,19,21], DC/DC converter topology [23,24], and additional functions, such as emergency power supply [14] or power factor correction [16], with simulations and experimental tests used to validate the proposed concepts.…”

“…Typical designs of energy storage systems in elevator applications use a bidirectional DC/DC converter and a supercapacitor bank [8,[13][14][15][16][17][18][19][20][21][22][23]. The research studies presented in the literature focus on control strategies [15,17], storage system design [13,14,[18][19][20][21][22], supercapacitor bank sizing [8,19,21], DC/DC converter topology [23,24], and additional functions, such as emergency power supply [14] or power factor correction [16], with simulations and experimental tests used to validate the proposed concepts. However, a comprehensive estimation of the energy savings achieved by energy storage systems is missing.…”